Fan



May 1', 1928.

C. O. JOHNSON FAN Filed March 2, 1925 Patented May 1, 1928.

UNITE cm 0. IOHKSOIL'OF EAST LAKE, t

' lpplieation ilcfl Iarch 2, 1925. Serial n. 12,147,

This invention relates to fans of the character used withautomobiles, and contemplates a structure by means of which the blades of the fan may maybe easily and conveniently adjusted or reversed to occupy any one of three distinct positions, the blades in one position being utilized to draw the cold air through the raidator to cool the water, which is very desirable in warm weather, when in another position, the blades are utilized to force the warm air about the motor outwardly through the radiator, so that the warm air can be utilized to assist in thawing out a frozen radiator or to assist in maintaining the water at a more or less constant temperature in cold weather, while the blades may occupy a neutral position which will not cause any currents of air to flow through the radiator during cold weather when the use of the fan is not desired.

The nature and advantages of the invention will be better understood when the following detailed description is read in connection with the accompanying drawing, the invention residing in the construction, combination and arrangement of parts as claimed. i i

In the drawing forming part of this appli- 'cation, like numerals of reference indicate similar parts in the several views, and where- Figure'l is a view of the fan partly in section showing how it is mounted, and the means for changing the [positions of the blades.

Figure 2 is a sectional .view taken on line 2-2ofFigure1. T r V Figure 3 is a perspective view of the adjusting slide.

Figure 4 is a fragmentary detail view of the lower end of one blade shaft.

Referring to the drawing in detail, indicates a pulley to which the hub 11 of the fan is ada ted to be secured in any suitable manner, the support for said pulley being indicated generally at 12. The hub 11 of the fan is rovided with ends 0 which communicate with an opening 13 arranged in the center of the hub and for a p to be hereinafter de- Arranged within each borejs a sleeve like member or bushing 14: which reoeives the shaft 15 of the adjacent blade 16,

the blades being mounted for partial rotation in either direction in order that the poin difl'erent directions so radial bores, the inner.

sitions may be varied for'the purpose above enumerated. The lower end of each shaft.

with a cam like member 17 clearly shown in Figure 4, and these cam like members of the respective blades operate in the openin 13 of the hub. Projectmg from each cam like member is a lug or pin 18, and, these pins operate in obliquely dis-- posed grooves 19 of a slide 20 which also op- 15 is providederates in the opening 13 of the hub as shown in Figure 1. Projecting from, one end of the slide is a short, shaft 21 which supports the spaced: collars 22 between which the forked extremity of a lever 23 is adapted to straddle the shaft 21 as show n in Flgure 1,

to operate theslide 20 in a manner to be presently described; One side of this slide is formed with a plurality of openings 24 which are adapted to singly receive a spring pressed pin 25 supported by theboss 26 of the hub to hold the slide fixedwith relation to the hub in any, given position. This slide is ada ted to be operated from the drivers seat 0 the vehicle, for which urpose use is made of the lever 23'which is llcrumed at a point in its length as at27, the upper end of the lever being connected with the adjacent end of a sliding rod 28 which is adapted to pass through the instrument board of the vehicle (not shown) within convenient reach of the driver. Manifestly, when the. rod 28 is moved in one direction, the slide 20 is moved within the opening 13 and when the rod 28 is moved in the opposite direction, the movement of the slide is co onding'ly reversed. It is obvious that w en the slide 20 is shifted in either direction the pins 18 operating in the obliquely groove 19 of said slide cause the blades 16 to rotate that the blades can be arranged in any one of a number of different positions to accomplish the desired re sult above mentioned. It will be noted that applicant provides a strong and durable structure, in that the long face of the cam contacts with the bore of the hub in a firm manner when the blades are in either of their extreme positions of rotation.

While it is believed that from the foregoing description, the nature and advantages of the invention will be readily apparent, I desire to have it understood that limitmyselftowhltisherein shown scribed, and that such may re sorted to when desired as I wlthm flu} scope of what is Having thus described the invention, I

cla1m: v

A fan includ dially disposed ing a hub having aligned rabores and an opening located 6 between the inner end of said bores, blades radiating from shaft capable 0 slide operating oblique grooves posite faces th the hub, each including a f rotation within the bores, a in said opening and having reversely disposed in the opereof, a cam carried by the lower end of each stem and having a relatively long face, a pin projecting from each CARL O. JOHNSON. 

